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Ford Performance Ring Gear and Pinion Kit - 3.55 Gears (99-04 GT)

Market Price $189.99 You Save 11% ($20.00)
Our Price

$169.99

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  • Item 50166G99
  • MPN# M-4209-G355A

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Features & Details

  • Ford Racing Quality
  • Strong Forged Construction
  • 3.55 Gear Ratio
  • 8.8" Ring Gear Diameter
  • For Street or Track Use
  • Fits 1999-2004 GT, Bullitt, Mach 1 and Cobra Mustangs
Improve ET's and low end torque. Are you looking to get more low end grunt off the line and lower ET's at the same time? Then look no further than installing a set of steeper gears in your Pony. Ford Racing Ring and Pinion Gears are perfect for street, road, or race use.

Superior Quality. These Ford Racing 3.55 Mustang ring and pinion gears feature a super strong forged construction, CNC cut & lapped gear teeth, and a black oxide finish to resist corrosion.

Recommended Upgrade. Changing the rear axle gear ratio will throw off the calibration of your Mustangs speedometer, but a Ford Racing Speedometer Recalibration Tool is an inexpensive way to fix this issue.

Application. This Ford Racing Ring and Pinion Gear set will fit all 1999 to 2004 V8 Mustangs including the GT, Bullitt, Mach 1 and Cobra models. A master bearing kit is recommended by most installers, especially on high mileage vehicles, see drop down option above.

Technical Note. Installation costs will vary, but a good rule of thumb is between $250 and $300. Be sure to work with a reliable shop that you trust for installations. You can also save money on your installation labor by having your Trac-Lok rebuilt at the same time as your gears are installed, see drop down option above.

Fitment: 1999 2000 2001 2002 2003 2004 Details

What's in the Box
  • (1) Ring gear
  • (1) Pinion gear
Installation Info
Tech Specs

Approximate RPM for 1999-2004 GT


Manual
Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 3700 5180 6660      
2 2190 3065 3941 4817 5693 6569
3 1445 2023 2601 3179 3757 4335
4 1095 1533 1971 2408 2846 3284
5 744 1042 1340 1638 1936 2233


Automatic
Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 3109 4353 5596 6840    
2 1697 2376 3054 3733 4412 5091
3 1095 1533 1971 2408 2846 3284
4 766 1073 1379 1686 1992 2299
Will it fit my Mustang?
  • Bullitt - 01
  • Mach 1 - 03, 04
  • Cobra - 99, 01, 03, 04
  • GT - 99, 00, 01, 02, 03, 04

People Who Bought This Item Also Bought

Most Helpful Reviews

5/5
3.55 Gears

I have a set of these in my car. After two weeks I had somehow bent an axle (without bending the tube), destroyed my LSD, and destroyed gears. I had the 3.55s swapped in. It is a huge difference. I went ...

Read More
Helpful (2)

5/5
3.55 ford racing gears

With this gears gave me acceleration and also made my car quicker at the track I recommend this for any one with boost cars the need the rpm to increase their boost

Helpful (1)

Overall Rating 5 out of 5 stars
Read All 6 Reviews

Customer Photos (1) Submit Your Photo

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1 Questions / 1 Answers

Ask a Question

will these work on my 2000 v6? just wondering if i will have to get special gears for my v6 or if these are interchangeable.

13alex

  • These gears are not interchangeable into the V6 models. These are only able to fit in the GT model as the V6's will have a different size rear end.

    KevinD92

Helpful (0)

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Customer Reviews (6) Write a Review

Overall Rating 5.0

out of 5 stars

Installation Time:Full Day

Installation Cost:$250-$500

  • Performance Gain 4.8 4.8
  • Fit 5 5



  • 5/5

    April 29, 2011

    3.55 Gears

    I have a set of these in my car. After two weeks I had somehow bent an axle (without bending the tube), destroyed my LSD, and destroyed gears. I had the 3.55s swapped in. It is a huge difference. I went 3.55 because I planned to go S/C. I am still doing S/C but planning to swap a T56 Magnum so, I am going to 3.73s. I loved the 3.55s but, want more.

    James

    Year: 2002 Submodel: GT

    Helpful (2)

  • 5/5

    Installation Time: Afternoon

    August 26, 2013

    3.55 ford racing gears

    With this gears gave me acceleration and also made my car quicker at the track I recommend this for any one with boost cars the need the rpm to increase their boost

    Fastredcobra

    Year: 2001 Submodel: Cobra San Francisco, CA, USA

    Helpful (1)

  • 5/5

    Installation Time: Weekend

    April 28, 2012

    3.55 Ford Racing Gears

    This product was a good buy, I bought the gears and the bearing kit and everything was a perfect fit. It took one weekend to finish the install and the results were outstanding, when I punch the throttle she's gone and there's no looking back. -Mark D.

    Dominique69

    Year: 2001 Submodel: GT New Orleans

    Helpful (1)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    July 28, 2017

    Amazing quality!

    These gears are amazing in quality and craftsmanship. These webt great in my daily driver, very fun with built rear end, made the car feel much more responsive and composed. Definitely worth it if you're looking for some light gears!

    Johnnny

    Year: 2002 Submodel: GT

    Helpful (0)

  • 5/5

    Installation Time: Shop Install

    June 11, 2017

    Spin the gears

    They fit and worked perfect. I had a shop install them as part of a complete rebuild.

    Stangbuster

    Year: 2003 Submodel: GT

    Helpful (0)

  • 5/5

    Installation Time: Less than 1 Hour

    December 09, 2011

    Excellent no other words are needed

    FRPP I think are the best products around. 85% of my 04 Mach 1 is from AM and FRPP either from you or direct from Ford. Thanks for all the help in the past and in the future.

    quicksilver

    Year: 2004 Submodel: Mach 1 Reading,Pa.

    Helpful (0)

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